What causes a car to bog out and blow smoke?

That's pretty broad... many things could make this happen, from head gaskets being blown to bad oil.

What color is the smoke? Did the car make any sounds? Did you notice any difference in performance at any point leading up to the breakdown?

To get the best answer, give a very concise, specific question. List as many details as you can about what happened, especially when it comes to something mechanical since there are so many variables at work.

Hope this helped! -Abaddon